diff -Nur libglpng-1.45.orig/Makefile libglpng-1.45/Makefile
--- libglpng-1.45.orig/Makefile	2008-03-27 19:33:50.000000000 -0500
+++ libglpng-1.45/Makefile	2009-07-03 14:53:28.900650418 -0500
@@ -1,4 +1,4 @@
-CFLAGS=-Wall -g -O3 -fPIC -I$(shell pwd)/include
+CFLAGS=-Wall -g $(EXTRA_CFLAGS) -I$(shell pwd)/include
 LDFLAGS=-lpng -lGL
 SHAREDLIBFLAGS=-shared
 DESTDIR=/usr/local
